Dental implant and head for a compaction drill

• US 6,981,873 B2
• Filed: 11/14/2001
• Issued: 01/03/2006
• Est. Priority Date: 12/09/2000
• Status: Active Grant

• Current Assignee: Han-Gu Kim, Jai-Hyun Lee, Shin-Koo Kim, Yong-Chang Choi, Young-Wook Choi
• Original Assignee: Han-Gu Kim, Jai-Hyun Lee, Shin-Koo Kim, Yong-Chang Choi, Young-Wook Choi
• Inventors: Kim, Han-Gu, Choi, Young-Wook, Kim, Shin-Koo, Choi, Yong-Chang, Lee, Jai-Hyun
• Primary Examiner(s): WEHNER, CARY ELLEN
• Application Number:
  US10/432,627
• Publication Number:
  US 20040219488A1
• Time in Patent Office: 1,511 Days
• Field of Search: 433/172, 433/173, 433/174, 433/175, 433/176
• US Class Current: 433/173
• CPC Class Codes: A61C 8/0022 Self-screwing A61C8/0028 takes precedence
• CPC Class Codes: A61C 8/0025 with multiple threads

Abstract

A dental implant includes a fixture and an abutment in a body, and a head for a compaction drill is configured for implanting such an implant. The implant includes an upper abutment portion on which a denture is fixed, a fixture portion implanted in the jawbone and forming single or double threads, and a settling portion formed between the abutment portion and the fixture portion. The invention improves the stability of the implant, improves stabilization of the bone tissue affixed to the implant, effectively seals the socket from its surroundings and facilitates bonding between implant and jawbone. This is achieved because of the early healing of tissue around the implant and the greater surface area in contact with surrounding tissue. As a result, an artificial crown may be coupled with the implant during the same surgery.

Claims

1. A dental implant comprising:

an upper abutment portion to which an artificial crown in fixed;

a lower fixture portion for securing said implant in a jawbone; and

a settling portion formed between said abutment portion and said fixture portion,

wherein a bone tissue is bonded to said settling portion and a diameter of said settling portion is gradually reduced from said upper abutment portion in a downward direction,

wherein said upper abutment portion, said lower fixture portion and said settling portion are formed unitarily and in one piece,

wherein a crown cap for fixing said artificial crown is mounted on said abutment portion,

wherein a surface of said abutment portion is machined and surfaces of said settling and said fixture portions are treated by a blasting method,

wherein said abutment portion further comprises;

an upper portion to which said artificial crown is fixed;

a chamfer for forming edge portions of said implant; and

a curved shoulder for maintaining closure of a junction epithelium and a connective tissue in the mouth,

wherein a plurality of minute screwed grooves are formed on a surface of said settling portion.

2. The dental implant according to claim 1, further comprising a cutting and constriction portion configured to cut the bone tissue and to constrict bone chips, wherein said cutting and constriction portion is formed at a lower portion of said fixture portion.

3. The dental implant according to claim 2, wherein said cutting and constriction portion comprises a first cutting edge, a second cutting edge and a third cutting edge which are upwardly formed from an end of said fixture portion for cutting the bone tissue, said cutting edges being respectively formed from the end of said fixture portion wherein inclined portions are upwardly formed from upper portions of said first, said second and said third cutting edges to constrict the bone chips.

4. The dental implant according to claim 3, wherein said first, said second and said third cutting edges have predetermined inclinations and are disposed on said lower fixture portion by the same interval.

5. The dental implant according to claim 1, wherein said crown cap has an inside shape corresponding to a shape of said abutment portion and is composed of an acrylic resin.

6. The dental implant according to claim 1, wherein average surface textures of said settling and said fixture portions are between about 1.0 μ

m and about 2.0 μ

m.

7. The dental implant according to claim 1, wherein said settling portion has a length of about 1 to about 3 mm corresponding to a cortex bone of the jawbone.

8. The dental implant according to claim 1, said curved shoulder further comprising a tissue-affixed portion wherein a soft tissue is attached to said tissue-affixed portion.

9. The dental implant according to claim 8, wherein a plurality of minute grooves are formed on a surface of said tissue-affixed portion and said tissue-affixed portion has length of about 0.5 to about 1.5 mm.

10. The dental implant according to claim 9, wherein each minute groove has a depth of about 15 to about 25 μ

m and is disposed by an interval of about 30 to about 50 μ

m.

11. The dental implant according to claim 1, wherein said upper portion of said abutment portion has a diameter upwardly reduced by an angle of about 4 to about 6°

concerning a vertical axis and a portion of said upper portion of said abutment portion has an even surface and other portions of said upper portion of said abutment portion have circular surfaces.

12. The dental implant according to claim 1, wherein an insertion groove for preventing said artificial crown from departing from said abutment is formed on said upper portion of said abutment portion.

13. The dental implant according to claim 1, wherein each minute groove has pitch of about 0.15 to about 0.25 mm and a thread angle of about 80 to about 120°

.

14. The dental implant according to claim 1, wherein at least one thread is formed on a surface of said fixture portion and said thread has depth of about 300 to about 500 μ

m and a pitch of about 700 to about 900 μ

m.

15. The dental implant according to claim 1, wherein a first thread and a second thread are alternately formed on a surface of said fixture portion.

16. The dental implant according to claim 15, wherein each of said first thread and said second thread has a depth of about 300 to about 500 μ

m and a pitch of about 700 to about 900 μ

m.